/*
app头部导航样式表
*/
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 75px;
    color: #101010;
    font-size: 1.2rem;
    padding-top: 38px;
    text-align: center;
    background-color: #fff;
    z-index: 99;
}
